B57236S0120M054

Overview

The B57236S0120M054 is a Negative Temperature Coefficient (NTC) thermistor classified as an inrush current limiter, manufactured by TDK Electronics. It features radial leads for printed circuit board mounting and operates within a temperature range of -55°C to +170°C. The component provides a nominal resistance of 12 Ohms with a tolerance of 20%, supporting a continuous current rating of 2.9 Amperes. It is rated for voltages of 115 VAC and 230 VAC, with a power rating of 2.1 Watts. Physical dimensions include a disc diameter of 11.5 mm, a width of 6 mm, lead spacing of 5 mm, and lead diameter of 0.6 mm.

Feature Summary

• Utilizes NTC thermistor technology to provide high initial resistance that decreases rapidly upon heating, effectively limiting peak inrush currents during power-up.
• Designed for robust PCB mounting with radial leads, ensuring secure mechanical attachment and reliable electrical connection in compact assemblies.
• Engineered for high thermal endurance, capable of sustained operation at elevated temperatures up to 170°C while maintaining stable performance characteristics.

Applications

• Protection against inrush currents in AC/DC power supplies
• Surge current limitation in consumer electronic devices
• Input stage protection for industrial control systems

Procurement Notes

Verify the specific ordering code suffix to ensure compatibility with required packaging formats and lead configurations. Confirm RoHS compliance status through official documentation prior to integration. Check lifecycle status, as components may be subject to obsolescence notices or recommended non-use designations. Cross-reference datasheet parameters against application requirements to validate thermal and electrical margins.

Selection Notes

Select this component based on the required steady-state resistance value and maximum operating current for the target circuit. Evaluate the physical footprint constraints to ensure the 11.5 mm diameter and 5 mm lead spacing fit the PCB layout. Consider the thermal environment to verify that the 170°C maximum operating temperature accommodates ambient conditions and self-heating effects without derating issues.

Part Context

This part belongs to the EPCOS S236 series of inrush current limiters, which are specialized NTC thermistors designed for protecting sensitive electronics from startup surges. The series offers various resistance values and current ratings to suit different power levels. As part of the TDK Electronics portfolio, these components leverage established manufacturing processes for reliability in automotive, industrial, and consumer applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official TDK Electronics documentation for direct replacements or cross-reference lists.